Megan Rae's Chicken Tetrazzini

Ingredients (14)

• + 1 (16 ounce) package spaghetti add to pantry
• ✓ 2 tablespoons butter
• + 4 skinless, boneless chicken breast halves add to pantry
• + 1 (14.5 ounce) can chicken broth add to pantry
• + 1 (10.75 ounce) can condensed cream of mushroom soup add to pantry
• + ½ cup milk add to pantry
• + 1 (16 ounce) container sour cream add to pantry
• + 1 ½ cups thinly sliced celery add to pantry
• + 1 ½ cups sliced fresh mushrooms add to pantry
• ✓ 2 teaspoons garlic powder
• + 1 teaspoon onion powder add to pantry
• + salt and pepper to taste add to pantry
• + salt and pepper to taste add to pantry
• ✓ ½ cup dry bread crumbs